火車って地獄行きなんですよね…？　【アンケート　おさおりんは一体どこに行こうとしている…？】

The wheelbarrow means they're headed for Hell, doesn't it...?

[Survey: Where in the world is Osa-Orin trying to go?]
• Dai-chan's place of destination, of course
• Former Hell
• I have no idea...
• Intentionally returning to Cirno House